The ghostscript[89] ports add gdkpixbuf (a gtk+-1.2 component) to USE_GNOME if WITH_GTK is set, while otherwise depending exclusively upon gtk+-2 components. Correct this by adding gdkpixbuf2 (a gtk+-2 component) instead. The supplied patch is for ghostscript9, the corresponding change should be made to ghostscript8.
Fix: Patch attached with submission follows: